How to make the year number of the party emblem on the square? You can't imagine the hard work behind it

Tiananmen tower, Chang'an Street, central axis and square constitute the core elements of the "majestic wheel" shape is particularly eye-catching. In the square, the most striking device is the year of the party emblem. The golden components are particularly eye-catching in the sunlight. But in fact, there are many difficulties in the process of the party emblem from artistic creativity to reality.

"This is the first time that six scale models and ten color templates have been developed repeatedly for engineering presentation." Recalling the production and construction process of the party emblem, Zhang jinxun, deputy general manager of Beijing Urban Construction Group, said frankly that it was a collision between artistic creation and engineering realization.

First of all, due to its unique shape, the aluminum plate should be absolutely flat in the welding process, "its length and width have reached 7.1 meters, and it is presented 360 degrees on the square without dead angle, which puts forward high requirements for the flatness of the aluminum plate." Zhang jinxun said.

Zhang jinxun, deputy general manager of Beijing Urban Construction Group (second from left)

Secondly, the surface of spray paint should be absolutely uniform, any small defect will be magnified infinitely under the sunlight. Such a large area of painting can only be carried out by hand. The teacher Fu, who has more than ten years of painting experience, holds the spray gun by hand and sprays the paint over and over again to ensure the uniform color and thickness of the paint surface. The painting should be carried out every 3 hours to make the paint film dry or solidified, and then the paint surface should be inspected, and the defective areas should be polished and repaired, and the repair will not affect the primer. In order to control the color of spray paint accurately, the sprayer needs to adjust enough paint at a time, spray in one direction, control the angle of spray gun, the amount of paint overlay of spray nozzle, and the speed of gun walking. In the spraying process, it is necessary to observe at all angles to ensure that each spraying is uniform and smooth.

Photo by Cai Daizheng

Zhang jinxun once participated in the construction of the square elements for the 70th anniversary of the national day, but it is much more difficult to participate in the construction of this celebration than the last one. Tight time, difficult engineering and high requirements have brought him and his colleagues great challenges“ In the past, we used to use linear industrial processing, but this time it's more like a work of art, relying on the great craftsman spirit of "striving for perfection and being infallible."